The Gunners have signed Man City duo Gabriel Jesus and Oleksandr Zinchenko this summer.
They are expected to be important contributors in the new season and have settled in well in the pre-season.
With Arsenal letting Tavares leave on loan, Zinchenko will play in the defensive option as well as the midfield.
Gabriel Jesus is expected to lead the line from Day One onwards.
Campbell tells Football Insider: “They are both winners. To bring that winning mentality into the dressing room is really important for Mikel Arteta.
“Their relationship on and off the field will help. They know what they have been through together at Man City. They have had to earn everything.
“Now they come into a team that is going to rely on them and their know-how. The Arsenal players have not been there. They have not been to the depths like these two.
“Arsenal have failed against teams that sit back but these guys have the know-how and the mentality to break teams down.
“They will ultimately help Arteta get this team to where he wants.”
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